macaulay



( No Model) 4 Sheets-Shet 1.

T. A. MAGAULAY. SEWING MACHINE.

No. 265,685. Patented Oct. 10, 1882..

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(No Model.) 1 4 Shets-Sheet 2:

T. A. MAGAULAY,

SEWING MACHINE. No. 265,685.. Patented Oct. 10, 1882.

WITNESSES: INVENTOR ATTORNEY S (No Model.) 4 Sheets-Sheet 3.

T. A. MAOAULAY.

SBWINGMAOHINE. No. 265,685. Patentd Oct. 10, 1882.

WITNESSES I INVENTOR I ATTORNEY (No Model.) 4 Sheets-Sheet 4.

T. A. MAOAULVAY.

SEWING MACHINE.- No. 265,685. Patented 001;. 10, 1882..

m I g {Q fiwgnsszs: f %NVBNTOR ATTORNEY feed mechanism.

UNiTEn STATES PATENT OFFICE.

THOMAS A. MAUAULAY, OF NEW YORK, N. Y.

SEWlNG-MAC HINE.

SPECIFICATION'forming' part of Letters Patent No. 265,685, dated October10, 1882,

Application filed October 22, 1881. (No model.)

To all whom it may concern Beit known that I, THOMAS A. MAOAULAY, ofthecity, county, and State of New York, have invented certain new anduseful improvements in Sewing-lilachines, of which the io'llowing,withthe accompanying drawings, is a specification.

The object of my invention is to provide a simple, durable, andefticient feed and shuttle operating mechanism and means for changingthe length of stitch, hereinafter more fully described.

In the drawings, Figure 1 is a sectional side elevation. Fig. 2 is asectional end view of the rear portion of Fig. 1. Fig. 3 is a bottomview of Fig. 1. Fig. 4 is a sectional end view of the Fig. 5 is a viewof a portion of the bed. Fig. 6 is a sectional side elevation of amodification of Fig. 1. Fig. 7 is an end view of Fig. 6.

A is the bed-plate. B is the arm. 0 is the face-plate. D is the maindriving-shaft. E is an eccentric. F F is a pitman-lever. G G is abell-crank lever. g is a stud. h is a ball-andslot joint. I is aball-joint. H is shuttle-carrying lever. H is a stud; J J is a vibratoryfeed-lever. K is a universal joint. L is a feedbar. lis a stop-bracket.m is a friction-spring. 0 is an eccentric. P is a shaft. t is a milleddial-plate. Ris a raised part of the bedplatc. S is the shuttle-slide. Tis the needle-bar. U is the presser-foot. V is the presser-bar. S is theshuttle. S is the shuttle-carrier. c is end of feed-bar.

Motion being imparted to the main drivingshaft D, the eccentric E, beingfixed to the shaft, imparts a vertical and vibratory motion to thepitnian-lever F F and an oscillating motion to the bell-crank lever GG,which, being connected to the shuttle-lever H by the ball-jointh, rocksit and moves the shuttle the requisite distance. The oscillatingvibratory lever J J, being connected with thelower end of thepitma-n-lever F F at J, and, having a universal or ball joint injhehearing K, has imparted to it an up-and-down forward-andback motion,which it imparts to the feed-bar L by its shorter arm J. The lower endof the pitman-lever F has an extent of motion corresponding to the throwof the eccentric E, suflicient to throw the shuttle the requisitedistance, but too great for operating the feed-bar, and therefore thelength of arms of the lever J J is proportioned from the fulcrum orbearin g K, so as to reduce the motion. to the requisite distance. Tooperate the feed, the feedbar L rests on the end 6 of the lever J J bythe force of the spring at, and receives its upward and forward motionsfrom the lever J J and its downward'and back motions from the spring a.The feed-bar projection 1, coming in contact with the eccentric 0,determines the length of stitch. The bed-plate A has a raised part, B,at the left-hand side of the shuttleslide S. This raised part iscountersunk and bored to receive the shaft 1 and the milled' dial-plateIt... The center of the countersink is so placed that a part of themilled dial-plate projects beyond the edge of the raised part It (seeFig. 5) sufficient to permit the finger to be applied to turn it to anydesired position. The friction-spring m is forked at one end and fitsinto a groove in the shaft P, to hold the dial-plate in the countersink,its other end being secured to the bedplate by a screw. The shaft P hasan eccentric, 0, and is rigidly secured to the dial plate and turns withit. l/Vhen the eccentric 0 is brought to or from the stop-bracket Z thelength of stitch is thereby changed. Instead of changing the length ofstitch in the manner above described, a lever may be pivoted to thefeed-bar and adjustably connected with the feed-lever J betweenthe'feed-bar and the journal K.

The shuttle in the machine herein described is operated backward fromthe operator while taking the loop of needle-thread. This is owing tothe fact that all the movements of the feedand shuttle mechanism aretaken from the same eccentric on the main shaft. The movement of theshuttle in a forward direction when taking the loop of needle-thread iswhen the pitman-lever is in its upward movement, and carries thefeed-lever down from the feed-bar by reason of its being jonrnaled at K,instead of upward to raise the feed.

If the position of the parts in Fig. 2 were reversed, so that thepitman-lever and feed-lever were in front of the bell-crank instead ofback of it, as it is, the shuttle could be moved forward instead ofbackward in taking the loop of needle-thread.

Fig. 6 shows the bell-crank at right angles to the shaft and connectedto the shuttle-carrier by a rod, H the pitman-lever being at its lowestposition when the shuttle has passed through the loop. A backwardmovement of the shuttle is not necessary in this case.

I have shown two forms of shuttle-operating mechanism; butmyinventionmay beembodied. in other well-known forms of shuttle mechanism, such asrock-shafts.

The advantages of the combination of mechanisms above described forshuttle and feed operating are that a common eccentric gives motion toboth the shuttle and feed operating levers, complication of the workingparts is avoided, and thus are insured economy of con- J J, all operatedby the said eccentric E, and

feed-bar L, substantially as set forth.

The foregoing specification signed byme this 22d day of October, 1881.

THOS. A. MAOAULAY.

Witnesses J. S. BROWN, W. R. J ONES.

